diff --git a/python/sglang/srt/utils/network.py b/python/sglang/srt/utils/network.py
index 4c8bc69b9..be36df9b9 100644
--- a/python/sglang/srt/utils/network.py
+++ b/python/sglang/srt/utils/network.py
@@ -222,9 +222,15 @@ def get_zmq_socket_on_host(
 
 
 def config_socket(socket, socket_type: zmq.SocketType):
-    mem = psutil.virtual_memory()
-    total_mem = mem.total / 1024**3
-    available_mem = mem.available / 1024**3
+    try:
+        mem = psutil.virtual_memory()
+        total_mem = mem.total / 1024**3
+        available_mem = mem.available / 1024**3
+    except Exception as e:
+        logger.warning(
+            "psutil.virtual_memory() failed (%s); using default ZMQ buffer size", e
+        )
+        total_mem = available_mem = 0
     if total_mem > 32 and available_mem > 16:
         buf_size = int(0.5 * 1024**3)
     else: